Biology 124 SI
Chapter 34
1. What are the four chordate characteristics?
2. Where is the notochord located in humans?
3. What did the dorsal hollow nerve cord become in humans?
4. What happened to the gill slits and muscular post-anal tail in humans?
5. Describe the characteristics of a lancelet. How many of the cordate characteristics does it have
as a larva? How many does it have as an adult?
6. What animal was mentioned as belonging to Urochordata? What chordate characteristics does
it display as a larva and as an adult?
7. What trait arises with class myxini?
8. Where and when do neural crest cells arise?
9. What are some other characteristics of craniates?
10. Give an example of an animal from myxini.
11. What are fibrous proteins usually used for? Are they soluble or insoluble, and give an example.
12. What are globular proteins usually for, are they soluble or insoluble, and give an example.
13. What is special about petromyzontida?
14. Describe an example from petromyzontida.
15. What is the meaning of gnathostomes and agnathostomes.